Title 16 - BUILDING AND CONSTRUCTION ... - King County

16.05.120 Appendix G - Swimming pools, Spas and Hot Tubs - Barrier requirements -
Prefabricated pools.
16.05.124 Appendix G - Swimming pools, spas and hot tubs - General.
16.05.127 Conformance of existing pools - Time limit for compliance with code - Failure to
comply.
16.05.130 Appendix K - Sound transmission - Sea-Tac noise program area.
16.05.010 Adoption. The International Residential Code for One- and Two-Family Dwellings
Code, as amended in chapter 51-52 WAC, effective July 1, 2007, as published by or jointly with the
International Code Council, Inc., together with appendices, amendments, additions, deletions and
exceptions hereinafter adopted by reference, together with the Washington state building code and with
King County modifications which shall be adopted and codified in this chapter are adopted as the King
County International Residential Code for One- and Two-Family Dwellings code and hereinafter referred to
as the International Residential Code, "IRC." Chapter 11 and Chapters 25 through 40 are not adopted.
The energy code is regulated by chapter 51-11 WAC; the plumbing code is regulated by chapter 51-56
WAC; the electrical code is regulated by chapter 296-46B WAC; and Appendix G is included in adoption
of the International Residential Code. (Ord. 15802 § 74, 2007: Ord. 14914 § 269, 2004).
16.05.020 Administration. Chapter 1 of the International Residential Code is not adopted and
Chapter 1 of the International Building Code as amended in K.C.C. chapter 16.02 is substituted. (Ord.
14914 § 270, 2004).
16.05.030 Appendices adopted. Appendices F, G, H and K of the International Residential
Code are adopted. (Ord. 15802 § 75, 2007: Ord. 14914 § 271, 2004).
16.05.040 Building Planning – Design criteria - Climate and Geographical Design Criteria
for King County. Table R301.2(1) of the International Residential Code is not adopted and the following
is substituted:
Table R301.2(1)
CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA FOR KING COUNTY
Subject to damage from
Ground
snow
load
Wind
speed
(mph)
Seismic
design
category
Varies 1 85 D1 or
D2 2
Weathering
Frost
line
depth
Moderate 12" <
1,000ft
elev. 3
Termit
e
Slight
to Mod.
Decay
Slight
to
Mod.
Winter
design
temp.
Iceshield
required
Flood
hazards
Air
freezing
index
25 No Varies 4 100 to
250
Mean
annual
temp.
1. Snow loads shall be determined in accordance with King County public rules. The minimum
roof design snow load shall be 25 pounds per square feet.
2. Seismic design category shall be D1 for areas of unincorporated King County to the east of the
Snoqualmie River as it traverses from the King County-Snohomish County line to the city limits of
Snoqualmie, east of the town of Snoqualmie, east of the Snoqualmie Parkway and the Echo Lake-
Snoqualmie Cut-off SE as they run from the city limits of the town of Snoqualmie to State Highway 18 and
to the south or east of State Highway 18. All other portions of unincorporated King County shall be seismic
design category D2.
3. The frost line depth shall be considered to be 12 inches for sites up to an elevation of 1000 feet
above sea level, 18 inches for sites greater than 1000 feet and up to an elevation of 2000 feet above sea
level or 24 inches for sites greater than 2000 feet above sea level. Frost depth may be otherwise
determined by specific site analysis, but shall not be less than 12 inches.
4. Flood hazard within King County varies. See the flood hazard code provisions of K.C.C.
chapter 21A.24. (Ord. 15802 § 76, 2007: Ord. 14914 § 272, 2004).
16.05.050 Building Planning – Design criteria - Disaster repair standards. Section R301 of
the International Residential Code is supplemented with the following:
Disaster repair standards (IRC 301.9). Repairs for buildings damaged by disasters shall comply
with Sections 3411.2 through 3411.7 of the International Building Code as amended by K.C.C. chapter
16.06. (Ord. 15802 § 77, 2007: Ord. 14914 § 273, 2004).
16.05.060 Garages and carports – Flood hazard areas. Section R309.5 of the International
Residential Code is not adopted and the following is substituted:
Flood hazard areas (IRC R309.5). Garage floors in buildings located in flood hazard areas shall
comply with the flood hazard standards in K.C.C. chapter 21A.24. (Ord. 14914 § 274, 2004).
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